Ephraim iiambujer



(Model.)

B. HAMBUJER.

LOOK.

No. 443,479. Patented Dec. 23,1890.

Z'phrap'nz Hambujer I UNITED STATES PATENT OFFICE.

EPI-IRAIM HAMBUJER, OF DETROIT, MICHIGAN, ASSIGNOR TO THE DETROIT LOCKAND MANUFACTURING COMPANY, OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 443,479, dated December23, 1890.

Application filed June 1890. Serial No. 357,175. (ModeL) I To 0415 whomit may concern: and this cam-plate is adapted to be engaged Be it knownthat I, EPHRAIM-HAMBUJER, a by the key, so as to be turned upon the postcitizen of the United States, residing at .Dethereby. To this end any ofthe usual means troit, in the county of WVayne and State of forinterlocking the parts are provided, and 5 Michigan, have inventedcertain new and usewhich are varied in the different locks. In fulImprovementsin Locks, of which the folthe drawings the ordinarymeanssuch as a lowing is a specification, reference being had notch g inthe cam-plate adapted to register therein to the accompanying drawings.with a stud on the key-are shown.

This invention relates to new and useful In practice, the parts beingarranged subto improvements in looks, and the invention is stantially asshown and described, they are designed to form an improvement on Patentintended to operate as follows: Supposing N o. 415,8l6,granted to meNovember 26, 1889. the parts in the position as shown in Fig. l, Theinvention consists in certain additional the key upon being insertedinto the lock will features, whereby it becomes much more difinterlockwith the cam-plate, and by turning r 5 ficult to pick the look, all asmore fully herethe key in the usual manner the cam-plate by inafterdescribed, and shown in the accomits engagement into the camway of thelatch panying drawings, in which will first lift the latchperpendicular, owing Figure 1 is a view in elevation of the lock toacertain initial eccentricity of the camway. complete. Fig. 2 is asection of the same as This lifting of the latch is made possible by 20attached in position. Fig. 3 is an end View the slot 0 in the latch,which allows the latch of the casing. Fig. 4 is a view in elevation toslide upwardly while at the same time the showing the latch thrown open.Fig. 5 is a turning is prevented by a stop 1', near the detachedelevation of the latch. Fig. (5 is a lower corner of the latch. As soon.as the modification of Fig. 1,and Fig. 7 is a detached latch is raisedsufficiently to pass the stop t 25 perspective View of the cam-plate.the latch is free to turn upon the key-post,

A represents the usual face-plate provided and this is obtained inthefurther movement with an elongated slot a, through which the of thecam-plate by its engagement in the locking-latch operates. end of thecamway. By continuing the B is a key-post secured to the face-platemovement of the two until the free end of the 30 and adapted to receivethe door or drawer, to latch is withdrawn into the face-plate the whichthe lock is attached in the usual manlock is opened. In thereverse-movement of ner. the key (which cannot be detached when the C isthe latch, provided with an elongated lock is open) the cam-platetravels freely on slot 0, through which the key-post projects the latchuntil it strikes reversing-curvej in 3 5 and upon which said latch isadapted to slide the camway. This compels the latch to swing 5 incontact with the face-plate. This latch is back upon the key-post as apivot until it is also provided with a camway D, cut, cast, or free fromthe stud o', when it will be drawn stamped into the latch, the peculiarform and back into position, as in Fig. l. The projecoperation of thiskeyway beinghereinafter extion 0 prevents the latch from being thrown 4oplained. At the lower end the latch has a too far in opening, and thecurved edge d 9 curved guiding-edge cl and a shoulder or pro guides thelatch while being swung open-or jection e, and the free end f of thelatch is closed. preferably rounded. It will be seen that the form ofthe cam E is a cam-plate secured upon the latch by way may be variedwithout altering the spirit 4 5 the key-post, free to turn, the key-posthavof my invention, it being shown longer in ing preferably a shoulderor projection 01, Fig. 6. which holds the parts in position free to moveThe cam-plate E performs the office of a independently of each other.This cam=plate safety-guard to prevent picking the lock, and throws thelatch open and closed by means at the same time it acts as a tumbler forthe 50 of a stud f, engaging into the camway D, latch. I00

What .l claim as my invention is 1. In a lock, the combination, with the021s ing, of a latch pivoted upon the key-post, a tumbler likewisepivoted upon said post and engaging with said latch, and a bearing forthe key in said tumbler, substantially as described.

2. In a lock, the combination, with the easing, of a latch pivoted uponthe key-post having alimited sliding movement thereon, a stop to lock itin its locked position, a cam way on said latch, and a tumbler engagingsaid cam- Way and adapted to disengage the latch from the stop and turnit upon its 1 )i\'ot,substantially as described.

3. In a lock, the combination, with the easing, of the pivoted latch C,having the cam \vay D, and the cam-plate E, having the stud f engagingin said camway, substantialiy as described.

In a lock,the combination of the pivoted latch 0, having the slotc,allowing a limited sliding movement of said latch, the eamway I), havingthe reversing-curve in said latch, and the cam-plate E, having the studfengaging in said camway, substantially as described.

5. In a lock, the combination of the pivoted latch C, having slot 0, thecamway I), having the reversing-curvej, the projection c, curved edge (Zon said latch,the stud i, and cam-plate E, having the stud f,substantially as described.

In testimony whereofl affix my signature in presence of two witnesses.

'EPIIRAIM IIAMHI JIIR.

Witnesses:

JAMES WHITTEMORE, I. M. IIULBERT.

